title: Calcium hydroxide root canal sealers: evaluation of pH, calcium ion concentration and conductivity.
abstract: The calcium hydroxide ionization of four root canal sealers (Sealapex, CRCS, Sealer 26, and Apexit) was studied by measuring conductivity and pH and by conducting atomic absorption spectrophotometry. Samples 6 mm in diameter and 15 mm long were prepared from these sealers. After setting and 48 h storage in a desiccator, five samples of each material were placed in 50 mL distilled water and analysed after 0,1,2,4,6 and 24 h and 5, 15 and 30 days. The results showed that Sealapex was the root canal sealer showing the highest pH, ionic calcium and total calcium values (P < 0.05) throughout the experimental period, followed by CRCS, Apexit and Sealer 26.
authors.affiliation: Department of Pediatric Dentistry, Ribeirão Preto Dental School, USP, Brazil.
authors.forename: L A
authors.initials: LA
authors.lastname: da Silva
authors.forename: M R
authors.initials: MR
authors.lastname: Leonardo
authors.forename: R S
authors.initials: RS
authors.lastname: da Silva
authors.forename: S
authors.initials: S
authors.lastname: Assed
authors.forename: L F
authors.initials: LF
authors.lastname: Guimarães
mesh_terms: D001729:Bismuth / Q000032:analysis / Q000737:chemistry*; D002118:Calcium / Q000032:analysis; D002126:Calcium Hydroxide / Q000032:analysis / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007474:Ion Exchange; D012387:Root Canal Filling Materials / Q000032:analysis / Q000737:chemistry*; D012459:Salicylates / Q000032:analysis / Q000737:chemistry*; D013054:Spectrophotometry, Atomic; D015034:Zinc Oxide / Q000032:analysis / Q000737:chemistry*
chemical_list: C074418:Apexit; D012387:Root Canal Filling Materials; D012459:Salicylates; C080620:Sealer 26; C055601:Sealapex; C075563:Calcibiotic Root Canal Sealer; D002126:Calcium Hydroxide; D015034:Zinc Oxide; D002118:Calcium; D001729:Bismuth